Function bigtools::utils::file::split_file_into_chunks_by_size

pub fn split_file_into_chunks_by_size(
    f: File,
    chunks: u64,
) -> Result<Vec<(u64, u64)>>

Split a file into n chunks of roughly equal sizes. The file is split into roughly equal sizes (by bytes), then each chunk is extended to the end of the last line in that chunk. Importantly, this doesn’t split the file into equal number of lines in each chunk. Also, the number of chunks may be lower than the provided number (which, is most obvious when each chunk is only a single line).